Field glass



Patented Sept.. 5, i922.

` DFHCE nvnnn'r'r ir. Dunne. or onnoivrii, ninwxvoiaizj c rmi-ln Grass'.

Application filed March 25, 1921. ySerial Ad-455,418.

T @ZZ whom it .may concern.'

yBe it known ythat l, Evnimr'i K. DUNNE, a

citizen of the United States,A and a residentr may be used lin a comparatively small holder.` Another object of the invention is to pro.

' vide fieldglasses in which the parts lare `glasses are extended for use. i

swung on, parallel laxes whereby they` inaybe movedtoward or from each other pivot-y ally to secure the right distance to accommodate readily the eyes of any person.' f A further object of the `invention is to provide swinging barrel sections inield glasses y together with means for` producing a` friction in the pivotal mountings so as tohhold the barrel sections in any adjusted,y position.

Another additional object is to provide iny iield glasses, lids or end glasseswhich will automatically move to a closed position when the glassesare collapsed and will automatically move to an open position as th ln the accompanyingdrawingsw Figure 1 is a longitudinal verticalsection through a iield glass disclosing ,one einbodiA ment of the inventionf Figurek 2 'is a sectional view through Figure 1 on line 2 2. l l

Figure 3. is a view ofthe lower end of the structure shown in Figure 1,- certain parts` being shown in di'lferent positions. i Figure e is a bottom plan lview of the structure shown in Figure 1. v,

Figure 5 is a detail fragmentary perspective view showing the lower part of a hingedy structure embodying certain features `of the u e 4 l f f pintles also extend through plates 28 and'24,

invention. D

Referring to the` accompanying drawings- 1 and 2. indicate the primary barrel sections while 3 `and 45, indicate the,

by numerals,

auxiliary barrelsections, said auxiliary barrel sections telescoping into theprimary barrel sections. At the outer endof each .of the primary barrel sections is arranged; a groove in whicha ring 5 is mounted `which acts asa stop for the object lens 6 which object lens isheld in 7 inturn is held in place by a retaining kring 8 mounted in a suitable groove in the'barrel section 1. The spring 7 is under tension soplace bya spring 7 and theispring as to press against the barrel section 1' as well as against ring 8 and lensG.' This spring if removed and released `will become slightly i i greater in diameter and` will become frapproximate twice as long as shown inthe drawing. `When compressed and restricted as shown inthedrawingthe spring 'acts as" means for firmly holding the lens in place at `a short distance from the outer end of the barrel section. This set back of the lens presentsahood `,or shading member 'for the lens .K s

,infk addition to1 presenting means whichwill be easily appliedy and removed'for holding .thellens in place and which willjprevent ioughfusage from scratching oryotherwise injuring the lens.

'The description Yof one lens and associated parts "will, apply .l toboth vas they x are identical'.- Arranged at the innerlendlof each of the barrel sectionsl and'2 is an end plate 9 Each of these sections is provided' respective threaded arms 10 and y11,'an aperf ture for yreceiving the' respective bracing wires 12 Aand 13 and a groove'for'receiving the respectiveretaining rings 14E. Arranged adjacent eachretainingl ring 14C is an eye lens 15` andfagainst this eye lens 15' isjpositioned a resilient washer l'acted on by the curved bottom 17 of the eye piece 18 for causing the `washer to resiliently press the eye lens against'the ring 14:. The eye piecek 18 may bejof rubber or' other suitable mate rial and is threaded onto the exterior ofthe auxiliary' barrel section 3. l Associated with thehrespective'barrel 'sections is a centrally positioned shaft 19havingfan aperture near vthe,upperend.through which la cross bar 20 ofthe pingtles 21`andf22 extend.'l These said'pintlesrbeing heldin place lby suitable `.nuts 25 screwed thereon. fA bush orA sleeve 26 surrounds the shaft 19 `between plates 23 and 24 so that the nuts 25 may be screwed .down tight and yet the' arms 10 and` llsmay kfreel t ltivill b efnotedffrom' `Figure 1 that the arms 10 and 11 'are provided.- with enlarge! ments having apertures through which the'` swing on thefpintles 21 andk 22. v

pintlesk21 and 22 extend sok that thesepintles, arms 10 andll yand associatedl parts form withy lthe auxiliary barrel sections and 4g 'i what maybe termed a headwhich V moves f Secondary pintlesA 27 and 28 are threaded at one end into the plate 30 and extend through plate 31, the respective hinge members 32, 33, 34, and plate 36. These hinge inembei's are made identical so thatthe description ot one will apply to all. lt lwill be noted that the hinge member 32 is provided with a threaded extension 37 which extends through oneor more of the barrel sections 2 throughiesilient strap 38 and carries'a nut 39 at the end, which nut clamps the shoulder 40 of the hinge 4member tightly against the barrel section 2 and also clamps the strip 38 against the inner'surface of said barrel section. The barrel section 2 is preferably tu'- bular or circular in cross section while the strip 38is preferably flat whereby when the Y conimodate large object lens or to accom! nut 39 istightened the resilient action of the flat resilient strip 38 will give a continuous friction or tension to the parts and thereby rigidly hold the parts together even it the apparatus is subjected to rough usage.

` By this construction and arrangement parallel axes are provided whereby the bar'- rel sections may be swung toward and from each other as indicated in Figure 2 to acmodate thev eyes of the person using the device. A .y

The shaft19 vis provided with threads 41 for part of its length'which threads co-act with the nut 42, which nut is held in a given position by a tube 43 and a tube 44, tube 43 having one 4end pressing lagainst plate 30 while tube 44 has one end pressing against the opposite end plate 45. lfn this way thev nut 42 is held against longitudinal inove ment butwhen rotated will reciprocate the shaft 19- and, consequently, will pull out or push in the auxiliary barrel sections 3! and 4. ln addition, the shaft`19 is ,provided with a reduced section 46 having a threaded end 47, said reduced section carrying a sleeve to shown in Figure 3. yAn oppositely" acting spring 54 is arranged in the tube 44l with one'end resting on nut 52 and the.v other o n'nut 49 so as to urge a pin'50 to the position shown 'in Figure l as the springv is conipressedvby the closing movement of the shaft `19. Preferably the spring 54 is stronger and stiffer thanthe spring 53 so as to readily overco'inethe same. Also the spring 54 lis comparatively short and, consequently, will not begin to operate the pin 50 until the auxiliary barrel sections 3 and 4 are almost in their telescoped or nested position as shown in Figure4 l. This arrangement of pin 50 and plate 51 has been provided in order to provide a ready and automatically actuated means for opening and closing the covers or lids 55 and 56. These lids may be of metal or other material and are intended to snugly iit the ends of the barrel sections 1 and 2. Identically formed plates 57 and 58 are riveted or otherwisesecured to each of these lids and twisted to form upstanding lever` sections 59 and 60. Each of these lever sections is provided with an opening 61 into which the ends of plate 5l project. These openings are so formed that asthe pin 5() moves inwardly from the position shown in Figure 1 to the position shown in Figure 3, the lever sections 59 and 60 will be swung on their pivots 62 and 63 a sufficient distance to cause the lids 55 and 56 to come in Contact at a central point. The pivot' pins 62`aiid 63 are mounted in suitablebrackets 64 which brackets are secured to the extensions 65 and 66 of plate 45, the securingr means being preferably suitable bolts 67 (Fig. 5); The bolt 67 also passes through the lower end of the pintles 27 so as to lock the pintles to the plate 45 and, consequently, support this plate so that the extensions 65 and 66 may act as abutinents 'for the springs 68 and G9 which springs also act on. the plate36 so as to-give a pull on the pintles 27 and 28 and thereby cause friction to be created between plate 36 andhinge members 34 and 35 and between plate 3l and hinge members32 and 33. This friction is not enough to be objectionable in moving the barrel sections but acts to hold the barrel sections in any adjusted position, as for instance, either in a full line or dotted line position illustrated in Figui-e2. f

1n operation, when it is desired to use the field glasses the barrel sections l and 2 are grasped and swung to the desired position for causing the eyes to `readily fit linto or come opposite the eye pieces 18. The nut 42 is then rotated for securing the desired focus, the first part of the movement of shaft '19 causing the lids 55 and 56 to move to an open position as shown in Figure 3. The

extension of the sections is continued until the desiredpfocus issecured. The glasses are `then used in the usual manner and when it is desired4 to lay the saine aside, nut 42 is rotated in a reverse direction for causing the parts to telescope together and automatically causing the lids 55 and 56 to move to a closed position.

The term glasses or field glasses,flias been used but it is to be'understood that the invention is applicable to 'not only tlie'ordinary iield glassnow in common use but to the prism binoculars and other instruments of the' saine general nature. lt will, therefore,

be understood that the term field glasses as used in the specification means any instrument to which it is applicable,

1. In a device of the character described, a lJ-shaped pivoting member, a pair of' barrel sections pivotally connected to said U- shaped' member, an auxiliary barrel section telescoping into each of the first mentioned barrel sections, means for roclrably connecting` the auxiliary barrel sections to said U- shaped member, and means for permitting the same to move in or out of said first mentioned barrel sections, said auxiliary sections being centrally arranged in said first mentioned barrel sections.

2. In a field glass of the character described a pair of primary barrel sections,

spaced hinging members on the sections for pivotally mounting each barrel section so that it may swing toward and Jfrom the opyposite barrel sectionindependently thereof,

an auxiliary barrel section slidingly mounted in each of the primary barrel sections and liinging members for pivotally mounting' each of said auxiliary barrel sections independently of the primary barrel sections, said last mentioned hinging members being arranged with their pintles in line With the pintles of the first mentioned hinge members.

scribed, a pair of swinging barrel members, pivotal means for mounting said barrel members, each of said pivotal means having said extension, and a clamping nut 'for pressing said strip against said barrel member whereby there Will be a continuous gripping c In a field glass of the character deaction for holding the barrel member rigid y to the pivotal member.

4. In a pair of field glasses a pair of barrels formed with primary barrel sections and sliding auxiliary barrel sections, ymeans for telescoping said sections, a lid for the end of said primary barrel sections carrying the object lens, a lever for movingy each of' said lids to an open and a' closed position and spring actuated means for automatically moving lsaid levers to open said lids when the auxiliary b-arrel sections have been movedk longitudinally to an operative. position.

5. In a field glass of the character described a barrel provided with a pair of spaced grooves adjacent one end oft' the barrel, a resilient ring arranged in each of said grooves, said ring acting as an abutment, an object lens arranged against the innermost of said rings and a coily spring having one end resting against the other ring and against said lens for firmly holding the lens in a given position.

6. In afield glass of the .character described a barrel provided With a primary barrel section and an auxiliary barrel section, said auxiliary barrel section being provided with a groove at one end, an eye lens arranged against said retaining ring, a retaining ring arranged Within said groove, a

flat resilient ringarranged in said auxiliary barrel with one edger resting against the periphery of said lens and an eye piece threaded onto said auxiliaryy barrel section, said eye piece being formed With a curved section adapted to press against the inner circumference of said washer and deform the same whereby said Washer will resiliently pressv said eye lens against said abutment.y

EVERETT K. DUNNE. 

